Sleeper beam welded gas pipe repair technology

Abstract

The invention relates to a sleeper beam welded gas pipe repair technology. The sleeper beam welded gas pipe repair technology comprises the steps that a gas base composition pressure maintaining test is conducted at first, if a gas pipe is qualified, repairing does not need to be carried out, and if the gas pipe is not qualified, Dg20 gas pipe crack judgment is conducted; if it is judged that a crack can be subjected to welding repairing, the Dg20 gas pipe is subjected to welding repairing, if it is judged that the crack cannot be subjected to welding repairing, an original pipeline is cut off along the inner side of a leakage point position of the Dg20 gas pipe, and an opening of the Dg20 gas pipe is blocked; and a t-branch pipe is additionally arranged on a gas base Dg50 gas pipe, a Dg20 gas pipe is additionally arranged nearby a gas base pipeline and is connected with the t-branch pipe, an original air supply pipeline is adjusted to supply air to the new Dg20 pipeline instead of supplying air to the original Dg20 pipeline. By means of the sleeper beam welded gas pipe repair technology, a sleeper beam welded gas pipe can be repaired, the repair process is simple and easy to operate, the repair speed is high, and the repair cost is low; and a sleeper beam does not need to be disassembled in the repair process, and the flatness of air spring installation bases on the two sides is not influenced.

Description

technical field [0001] The invention relates to a bolster welded gas pipe repair process, which is especially suitable for repairing the welded gas pipe at the bolster of a railway passenger car PW-220 (K) type bogie. Background technique [0002] Such as figure 1 As shown, taking a vehicle equipped with a PW-220(K) bogie as an example, the air spring air inlet is located under the corbel, integrally formed with the air spring mounting seat, and welded to the lower cover of the car body corbel 1 Above, the air pipe on the air seat 2 is welded to the corbel web section. In the process of operation and maintenance, cracks and air leakage are very likely to appear at the welding place between the Dg20 air pipe 3 and the corbel web, which affects the stability of the vehicle operation. figure 1 Among them, 4 is Dg50 trachea. [0003] After the tracheal crack, it is difficult to deal with due to its structural limitation. If it is replaced as a whole, in terms of maintenance ...

AI Technical Summary

Problems solved by technology

In terms of maintenance cycle, when replacing, the air spring mounting seat should be disassembled and put on the ground as a whole, and then assembled and welded after making a new product. The process is complicated, and it takes about one week from material preparation to completion, and the maintenance cycle is longer

Moreover, it is difficult to control the flatness of the air spring mounting seats on both sides of the bolster during the overall replacement

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